The CML has dozens of seasonal ebooks, as well as timely print books on the shelves. If you're interested in lesson plans with a winter theme, check out the links below.
8 Fun Winter Activities and Lesson Plans
Winter Lesson Plans (ReadWriteThink)
15+ Winter-Themed Science Activities and Lessons
Tips, Tricks and Lesson Ideas for Outdoor Winter Learning
Winter Math
Winter Expressions (Poetry)
Seasonal Science Resources for Your Classroom